Microsoft 365 Copilot's Business Chat
Microsoft- Product type
- Other
- Catalog vulnerabilities
- 8
Severity across 7 analyzed records
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As of 09/29/2026, within CyStack's analyzed data, Microsoft 365 Copilot's Business Chat has 1 security vulnerability published in the last 90 days. Of these, 1 is rated High or Critical. None of these vulnerabilities is listed in the CISA KEV catalog. CyStack recommends that organizations and individual users remediate applicable vulnerabilities as soon as possible.
CyStack does not yet have sufficient official-source data to identify the latest version of Microsoft 365 Copilot's Business Chat and determine which vulnerabilities affect that version.
CyStack VulnScan continuously discovers assets, validates vulnerabilities, and helps security teams prioritize remediation across the organization.
Explore CyStack VulnScan| Vulnerability | Exploitation status | Fix | Published | Severity |
|---|---|---|---|---|
CVE-2026-78501Microsoft 365 Copilot Business Chat Information Disclosure Vulnerability | Exploitation statusNot known exploited | FixYes | Published09/17/2026 | SeverityHigh |
CVE-2026-26129M365 Copilot Information Disclosure Vulnerability | Exploitation statusNot known exploited | FixYes | Published05/07/2026 | SeverityHigh |
CVE-2026-26164M365 Copilot Information Disclosure Vulnerability | Exploitation statusNot known exploited | FixYes | Published05/07/2026 | SeverityHigh |
CVE-2026-26137Microsoft Exchange Elevation of Privilege Vulnerability | Exploitation statusNot known exploited | FixYes | Published03/19/2026 | SeverityCritical |
CVE-2025-59286Copilot Information Disclosure Vulnerability | Exploitation statusNot known exploited | FixYes | Published10/09/2025 | SeverityCritical |
CVE-2025-59272Copilot Information Disclosure Vulnerability | Exploitation statusNot known exploited | FixYes | Published10/09/2025 | SeverityCritical |
CVE-2025-53787Microsoft 365 Copilot BizChat Information Disclosure Vulnerability | Exploitation statusNot known exploited | FixYes | Published08/07/2025 | SeverityHigh |
CVE-2025-53774Microsoft 365 Copilot BizChat Information Disclosure Vulnerability | Exploitation statusNot known exploited | FixYes | Published08/07/2025 | SeverityMedium |